Sunday, January 16, 2011
Java :: Use goo.gl URL shorten from Java
Google API news: the company recently announced an API for its URL shortening service "goo.gl". Developers can use the API to integrate shortened goo.gl URLs into their own projects. It's a RESTful JSON API (documentation is here). I couldn't find an example written in Java, so here is my contribution:
private String googUrl = "https://www.googleapis.com/urlshortener/v1/url?shortUrl=http://goo.gl/fbsS&key=<YourAPIKey>";
public String shorten(String longUrl)
{
String shortUrl = "";
try
{
URLConnection conn = new URL(googUrl).openConnection();
conn.setDoOutput(true);
conn.setRequestProperty("Content-Type", "application/json");
OutputStreamWriter wr =
new OutputStreamWriter(conn.getOutputStream());
wr.write("{\"longUrl\":\"" + longUrl + "\"}");
wr.flush();
// Get the response
BufferedReader rd =
new BufferedReader(
new InputStreamReader(conn.getInputStream()));
String line;
while ((line = rd.readLine()) != null)
{
if (line.indexOf("id") > -1)
{
// I'm sure there's a more elegant way of parsing
// the JSON response, but this is quick/dirty =)
shortUrl = line.substring(8, line.length() - 2);
break;
}
}
wr.close();
rd.close();
}
catch (MalformedURLException ex)
{
Logger.getLogger(ShortenUrl.class.getName()).log(
Level.SEVERE, null, ex);
}
catch (IOException ex)
{
Logger.getLogger(ShortenUrl.class.getName()).log(
Level.SEVERE, null, ex);
}
return shortUrl;
}
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